Spherical shaft processing tooling
By designing a spherical shaft machining fixture with multiple pressure plates and V-grooves, the positioning accuracy and clamping stability problems of traditional fixtures were solved, enabling high-precision and high-speed spherical shaft machining, thus improving production efficiency and the versatility of the fixture.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAJABOARD TECH (CHENGDU) CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional spherical shaft machining fixtures suffer from insufficient positioning accuracy, poor clamping stability, and low machining efficiency. In particular, they have poor versatility in multi-batch production, leading to dimensional deviations and surface defects, and increasing grinding costs.
A spherical shaft machining fixture was designed, which adopts a distributed clamping structure of multiple pressure plates and clamping bolts, combined with the inclined surface design of V-groove, to achieve rapid centering and rigid clamping of the spherical shaft, suppress machining vibration, and ensure dimensional consistency and surface finish.
It improves the machining accuracy and efficiency of spherical shafts, reduces centering errors and local deformation, enhances the versatility of tooling, and reduces subsequent grinding costs.
Smart Images
Figure CN224488818U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tooling and fixture technology, specifically to a tooling for machining spherical shafts. Background Technology
[0002] In the field of mechanical manufacturing, spherical shafts are widely used as key transmission components in automotive steering systems, hydraulic equipment, and precision instruments. However, traditional machining fixtures suffer from insufficient positioning accuracy, poor clamping stability, and low machining efficiency, making it difficult for the spherical profile to meet high-precision fitting requirements. Especially in multi-batch production, existing fixtures have poor versatility, are cumbersome to adjust, and are prone to dimensional deviations and surface defects, increasing subsequent grinding costs. Utility Model Content
[0003] This invention provides a machining fixture for spherical shafts, enabling rapid centering and rigid clamping of the spherical shafts, effectively suppressing machining vibrations, ensuring dimensional consistency and surface finish of the spherical surface, and providing reliable process assurance for the mass production of high-precision spherical shafts.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a spherical shaft machining fixture, comprising: a main body, wherein the top of the main body is provided with a shaft positioning groove along the length direction; and multiple pressure plates, which are respectively arranged across both sides of the shaft positioning groove, and each pressure plate is connected to the top of the main body by a through clamping bolt.
[0005] Preferably, the bottom of the shaft positioning groove has a V-shaped structure.
[0006] Preferably, the top of the main body is provided with movable grooves on both sides corresponding to the shaft positioning groove, and each pressure plate is located in the corresponding movable groove.
[0007] Preferably, each of the pressure plates has a round hole at one end and a side slot at the other end, and is connected to the main body by clamping bolts that pass through the round hole and the side slot respectively.
[0008] Preferably, both the pressure plate and the clamping bolt are submerged in the movable groove.
[0009] The beneficial effects of this invention are as follows: The spherical shaft is placed axially within the shaft positioning groove, and the contour of the positioning groove is used to achieve initial radial positioning, ensuring that the shaft centerline is aligned with the machining datum. Multiple pressure plates span both sides of the shaft positioning groove, and by tightening the clamping bolts, downward pressure is applied to firmly press the shaft into the positioning groove, preventing displacement or vibration during machining. The multiple pressure plates are distributed along the length of the shaft, allowing for independent adjustment of the clamping force for different sections of the spherical shaft, avoiding localized deformation. This is particularly suitable for shafts with a large length-to-diameter ratio, reducing alignment errors during clamping. The distributed clamping of the multiple pressure plates provides uniform force, thus suppressing cutting vibration and preventing surface roughness deterioration caused by machining chatter, thereby ensuring that the sphere center coincides with the machining axis and improving the accuracy of the spherical contour. Furthermore, the inclined surface of the V-groove is compatible with shafts of different diameters within a certain range, thus eliminating the need for frequent replacement of positioning blocks and improving the versatility of the tooling. Simultaneously, the contact line between the spherical shaft and the V-groove automatically adjusts to ensure that the shaft center is always located on the symmetry line of the V-groove, reducing alignment errors and preventing the shaft from rolling or shifting before clamping. Combined with the pressure plate, this forms a three-point clamping mechanism, further enhancing vibration resistance. The pressure plate and clamping bolts are lower than the top of the main body, ensuring that the main body can be clamped at various angles. After the two clamping bolts on each pressure plate are loosened, the pressure plate rotates laterally around the circular hole, opening the shaft positioning groove. This facilitates the clamping and removal of the spherical shaft, allowing for quick adaptation to the initial positioning of the spherical shaft and improving work efficiency. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0012] Figure 2 This is a schematic diagram of the pressure plate structure of this utility model;
[0013] Figure 3 This is a schematic diagram of the application status of this utility model.
[0014] In the diagram: 1. Main body; 2. Shaft positioning groove; 3. Pressure plate; 4. Movable groove; 5. Round hole; 6. Side slot; 7. Clamping bolt. Detailed Implementation
[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0016] according to Figure 1 , Figure 2 , Figure 3 As shown, a spherical shaft machining fixture includes: a main body 1, the top of the main body 1 having a shaft positioning groove 2 along its length; and multiple pressure plates 3, which are respectively arranged across both sides of the shaft positioning groove 2, and each pressure plate 3 is connected to the top of the main body 1 by a through clamping bolt 7.
[0017] With the above setup, the spherical shaft is placed axially within the shaft positioning groove 2, and the contour of the shaft positioning groove 2 is used to achieve initial radial positioning, ensuring that the shaft centerline is aligned with the machining datum. Multiple pressure plates 3 span both sides of the shaft positioning groove 2, and by tightening the clamping bolts 7, downward pressure is applied to firmly press the shaft into the positioning groove, preventing displacement or vibration during machining. The multiple pressure plates 3 are distributed along the length of the shaft, allowing for independent adjustment of the clamping force for different sections of the spherical shaft, avoiding localized deformation. This is particularly suitable for shafts with a large length-to-diameter ratio, reducing alignment errors during clamping. The distributed clamping of the multiple pressure plates 3 provides uniform force, thus suppressing cutting vibration and preventing surface roughness deterioration caused by machining chatter, thereby ensuring that the sphere center coincides with the machining axis and improving the accuracy of the spherical contour.
[0018] The bottom of the shaft positioning groove 2 has a V-shaped structure. This design allows for the use of the inclined surface of the V-groove to accommodate shafts of different diameters within a certain range, thus eliminating the need for frequent replacement of positioning blocks and improving the versatility of the tooling. Simultaneously, the contact line between the spherical shaft and the V-groove automatically adjusts, ensuring that the shaft center is always located on the symmetry line of the V-groove, reducing alignment errors and preventing the shaft from rolling or shifting before clamping. Combined with the pressure plate 3, this forms a three-point clamping mechanism, further enhancing vibration resistance.
[0019] The top of the main body 1 has movable grooves 4 on both sides corresponding to the shaft positioning groove 2, and each pressure plate 3 is located in the corresponding movable groove 4. Each pressure plate 3 has a round hole 5 at one end and a side slot 6 at the other end, and is connected to the main body 1 by clamping bolts 7 that pass through the round hole 5 and the side slot 6 respectively. The pressure plate 3 and the clamping bolts 7 are both recessed in the movable groove 4.
[0020] With the above design, the pressure plate 3 and the clamping bolts 7 are lower than the top of the main body 1, thus ensuring that the main body 1 can be clamped at various angles. After the two clamping bolts 7 of each pressure plate 3 are loosened, the pressure plate 3 rotates laterally around the circular hole 5 as the axis, thereby opening the shaft positioning groove 2, which facilitates the clamping and removal of the spherical shaft, thus allowing for quick adaptation to the initial positioning of the spherical shaft and improving work efficiency.
[0021] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A tooling for machining a spherical shaft, characterized in that, include: The main body (1) has a shaft positioning groove (2) on its top along the length direction; Multiple pressure plates (3) are provided and span both sides of the shaft positioning groove (2). Each pressure plate (3) is connected to the top of the main body (1) by a through clamping bolt (7).
2. The spherical shaft machining fixture according to claim 1, characterized in that: The bottom of the shaft positioning groove (2) has a V-shaped structure.
3. The spherical shaft machining fixture according to claim 2, characterized in that: The top of the main body (1) is provided with movable grooves (4) on both sides corresponding to the shaft positioning groove (2), and each pressure plate (3) is located in the corresponding movable groove (4).
4. The spherical shaft machining fixture according to claim 3, characterized in that: Each of the pressure plates (3) has a round hole (5) at one end and a side slot (6) at the other end, and is connected to the main body (1) by clamping bolts (7) that pass through the round hole (5) and the side slot (6) respectively.
5. The spherical shaft machining fixture according to claim 4, characterized in that: The pressure plate (3) and the clamping bolt (7) are both submerged in the movable groove (4).